#loading_page {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.5);
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 30px;
    font-family: sans-serif;
    z-index: 99999;
}